Confocal images of AsPC1 cells treated with FAM-conjugated peptides (CR1171, CR1172 and CR1173). (a-c) Control experiment, cells treated with DMSO, (d-f) cells treated with compound CR1171, (g-I) cells treated with compound CR1172, (j-l) cells treated with compound CR1173. Green fluorescence emissions due to presence of fluorescein in peptide were collected through a 505–550 nm band pass filter in conjunction with an argon ion laser excitation of 488 nm. The blue fluorescence emissions were collected through a 420–480 nm band pass filter in conjunction with a diode laser excitation of 405 nm for DAPI. No green fluorescence was observed in control cells treated with DMSO due to absence of fluorescein.